optimism的形容词反义词

　　例句：

　　How optimistic would you be?

　　你会如何乐观？

　　Are you optimistic about the future?

　　你对未来乐观吗？

　　I think that we have reason to be optimistic.

　　我认为我们有乐观的理由。

　　The pessimism may be overdone.

　　这种悲观主义也许过了头。

　　What is pessimism after all?

　　到底什么是悲观情绪呢？

　　What's driving this new pessimism?

　　是什么驾驭着这些新悲观主义？